OAK KNOLLS MUTUAL WATER COMPANY
PWSID: CA1500465 · Lake Isabella, CA · Serves 123 people
According to EPA Safe Drinking Water Information System (SDWIS), OAK KNOLLS MUTUAL WATER COMPANY (PWSID CA1500465) in Lake Isabella, CA is listed as a CWS water system covering about 123 people. The same extract lists 8 health-based violation records spanning 2024-2025. Those 8 health-based rows for OAK KNOLLS MUTUAL WATER COMPANY cover contaminants such as Nitrate, LEAD AND COPPER RULE REVISIONS; they remain historical EPA registry entries, not a current compliance or drinkability score.
OAK KNOLLS MUTUAL WATER COMPANY has 8 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 2 distinct EPA contaminant codes appear in this system's record, including Nitrate, LEAD AND COPPER RULE REVISIONS. Recorded violations span 2024–2025. Day-to-day primacy enforcement for this system runs through the California drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the California state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- CA1500465
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Lake Isabella, CA
- Population Served
- 123
- Health Violations
- Yes (8)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Nitrate | 7 | 7 |
| LEAD AND COPPER RULE REVISIONS | 1 | 1 |
Violation History (8)
Frequently Asked Questions
What does EPA SDWIS list for OAK KNOLLS MUTUAL WATER COMPANY?
How many people does OAK KNOLLS MUTUAL WATER COMPANY serve?
What violations does OAK KNOLLS MUTUAL WATER COMPANY have?
What contaminants have been found in OAK KNOLLS MUTUAL WATER COMPANY water?
Compare beyond California
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest OAK KNOLLS MUTUAL WATER COMPANY on cumulative violation count (8) and EPA-reported population served (123). Violation-count peers include Mashantucket Pequot Water System, San Ildefonso Pueblo, TOWAOC WATER SYSTEM.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Nearby Water Systems
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About This Data
OAK KNOLLS MUTUAL WATER COMPANY (CA1500465) is drawn from EPA SDWIS. Nearby county systems in this extract include DELANO, CITY OF; OILDALE MWC; TEJON CASTAC WD - I5 & LAVAL RD; VAUGHN WC INC. Health-based rows (8 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.